The earphones are Bluetooth earphones and listening test earphones Coverage frequency range 60-108MHZ, ...    More ...

The earphones are Bluetooth earphones and listening test earphones Coverage frequency range 60-108MHZ, public radio campus broadcast, CET-4 and CET-6 listening test, all available. Cet-4, CET-6 and Professional listening test can be easily taken. With soft and skin-friendly silicone material, give you comfort from the inside out, wear all day without ear pain. Comfortable to wear, fit ear canal does not swell pain, skin-friendly material, sponge ear muffs, light and no pressure, wear if nothing.。
Less ...